These authors contributed equally to this work.
Steatohepatitis and Metabolic Liver Disease
Frequency of the cholesteryl ester storage disease common LIPA E8SJM mutation (c.894G>A) in various racial and ethnic groups
Article first published online: 29 JUL 2013
Copyright © 2013 American Association for the Study of Liver Diseases
Volume 58, Issue 3, pages 958–965, September 2013
How to Cite
Scott, S. A., Liu, B., Nazarenko, I., Martis, S., Kozlitina, J., Yang, Y., Ramirez, C., Kasai, Y., Hyatt, T., Peter, I. and Desnick, R. J. (2013), Frequency of the cholesteryl ester storage disease common LIPA E8SJM mutation (c.894G>A) in various racial and ethnic groups. Hepatology, 58: 958–965. doi: 10.1002/hep.26327
Potential conflict of interest: R.J.D. is a consultant for and owns stock options of Synageva BioPharma, the company developing enzyme replacement therapy for LAL deficiency.
Supported in part by the National Center for Advancing Translational Sciences (NCATS), National Institutes of Health (NIH), through grants KL2TR000069 (S.A.S.) and UL1TR000067 (I.P.).
- Issue published online: 29 AUG 2013
- Article first published online: 29 JUL 2013
- Accepted manuscript online: 19 FEB 2013 08:17AM EST
- Manuscript Accepted: 6 FEB 2013
- Manuscript Received: 2 OCT 2012
Cholesteryl ester storage disease (CESD) and Wolman disease are autosomal recessive later-onset and severe infantile disorders, respectively, which result from the deficient activity of lysosomal acid lipase (LAL). LAL is encoded by LIPA (10q23.31) and the most common mutation associated with CESD is an exon 8 splice junction mutation (c.894G>A; E8SJM), which expresses only ∼3%-5% of normally spliced LAL. However, the frequency of c.894G>A is unknown in most populations. To estimate the prevalence of CESD in different populations, the frequencies of the c.894G>A mutation were determined in 10,000 LIPA alleles from healthy African-American, Asian, Caucasian, Hispanic, and Ashkenazi Jewish individuals from the greater New York metropolitan area and 6,578 LIPA alleles from African-American, Caucasian, and Hispanic subjects enrolled in the Dallas Heart Study. The combined c.894G>A allele frequencies from the two cohorts ranged from 0.0005 (Asian) to 0.0017 (Caucasian and Hispanic), which translated to carrier frequencies of 1 in 1,000 to ∼1 in 300, respectively. No African-American heterozygotes were detected. Additionally, by surveying the available literature, c.894G>A was estimated to account for 60% (95% confidence interval [CI]: 51%-69%) of reported mutations among multiethnic CESD patients. Using this estimate, the predicted prevalence of CESD in the Caucasian and Hispanic populations is ∼0.8 per 100,000 (∼1 in 130,000; 95% CI: ∼1 in 90,000 to 1 in 170,000). Conclusion: These data indicate that CESD may be underdiagnosed in the general Caucasian and Hispanic populations, which is important since clinical trials of enzyme replacement therapy for LAL deficiency are currently being developed. Moreover, future studies on CESD prevalence in African and Asian populations may require full-gene LIPA sequencing to determine heterozygote frequencies, since c.894G>A is not common in these racial groups. (HEPATOLOGY 2013;53:958–965)